/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package servlet;

import hibernate.AlbumDAO;
import hibernate.ImageDAO;
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import jaxb.AlbumContentMarshaller;
import jaxb.AlbumMarshaller;
import photogallery.Album;
import photogallery.Image;

/**
 *
 * @author Saji
 */
public class DefaultController extends HttpServlet {

    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/xml;charset=UTF-8");
        PrintWriter out = response.getWriter();
        String realPath = getServletContext().getRealPath("/") + "WEB-INF\\";

        try {
            String action = request.getParameter("action");
            if (null == action || action.equals("")) {
                RequestDispatcher rd = request.getRequestDispatcher("loginPage.jsp");
                rd.forward(request, response);
            } else if (action.equals("view_all_album")) {
                File file = new File(realPath + "albums.xml");

                boolean exists = file.exists();
                if (!exists) {
                    AlbumMarshaller am = new AlbumMarshaller();
                    am.createXML(realPath);
                }

                RequestDispatcher rd = request.getRequestDispatcher("index.jsp");
                rd.forward(request, response);
            } else if (action.equals("view_album")) {
                Integer albumId = new Integer(request.getParameter("albumId"));
                AlbumDAO abDao = new AlbumDAO();
                Album album = abDao.findByAlbumID(albumId);
                String url = "viewImage.jsp?albumId=" + albumId + "&albumName=" + album.getName();

                File file = new File(realPath + "album-" + albumId + ".xml");
                boolean exists = file.exists();
                if (!exists) {
                    Image[] images;
                    AlbumContentMarshaller acm = new AlbumContentMarshaller();
                    ImageDAO idao = new ImageDAO();
                    images = idao.getAlbumImages(albumId);
                    acm.createXML(albumId, images, realPath);
                }

                RequestDispatcher rd = request.getRequestDispatcher(url);
                rd.forward(request, response);
            } else if (action.equals("delete_album")) {
                Integer albumId = new Integer(request.getParameter("albumId"));
                AlbumDAO abDao = new AlbumDAO();
                abDao.deleteAlbum(albumId);
                AlbumMarshaller am = new AlbumMarshaller();
                am.createXML(realPath);
                String url = "index.jsp";
                RequestDispatcher rd = request.getRequestDispatcher(url);
                rd.forward(request, response);
            } else if (action.equals("delete_image")) {
                Integer albumId = new Integer(request.getParameter("albumId"));
                Integer imageId = new Integer(request.getParameter("imageId"));
                ImageDAO imgDao = new ImageDAO();
                Image img = imgDao.findByImageID(imageId);
                boolean isCover = img.isIsCover();
                imgDao.deleteImage(imageId);
                AlbumContentMarshaller acm = new AlbumContentMarshaller();
                Image[] images = imgDao.getAlbumImages(albumId);
                acm.createXML(albumId, images, realPath);
                AlbumDAO abDao = new AlbumDAO();
                Album album = abDao.findByAlbumID(albumId);
                String url = "viewImage.jsp?albumId=" + albumId + "&albumName=" + album.getName();
                if(isCover){
                    abDao.autoSelectCover(albumId);
                    AlbumMarshaller am = new AlbumMarshaller();
                    am.createXML(realPath);
                }
                RequestDispatcher rd = request.getRequestDispatcher(url);
                rd.forward(request, response);
            }

        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            out.close();
        }
    }

    protected void checkSessionId(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        //HttpSession session = request.getSession(true);
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
